加拿大很多樹但也期望森林吸收掉人們無節制排放的二氧化碳。 tvb now,tvbnow,bttvb0 k( W+ [& `# F( {5 [" {1 ]: A, y
SweetLemon 發表於 2016-7-14 10:34 AM ![](http://www.tvboxnow.com/images/common/back.gif)
. [9 x, ~. L" ~$ U% jnot enough trees in the city![](http://www.tvboxnow.com/images/smilies/default/003.gif) www.tvboxnow.com4 m5 y+ y- H4 Z; ]3 {7 K' r
9 H# K7 A, [: B. r' u) h公仔箱論壇No, I read that when the leaves fall it released CO2 back to nature.
7 ^1 ^0 d G: K( zI don't know its true or not. |